Table 4. Multivariate analysis of significant factors among previous univariate analysis with CA19-9 levels.

	Preoperative CA19-9 levels			Postoperative CA 19-9 levels
Variables	odds ratio	95% CI	P value	odds ratio	95% CI	P value
Lymph node metastasis	3.471	1.216–9.905	0.020	3.427	0.913–12.864	0.068
Vascular invasion	3.643	0.955–13.897	0.058	-	-	-
Early recurrence	8.280	2.391–28.674	0.001	4.006	1.107–14.459	0.034

CA19-9: carbohydrate antigen 19-9.